diff --git a/websocket-sharp/Ext.cs b/websocket-sharp/Ext.cs
index bed790ec1..4d8b16ba1 100644
--- a/websocket-sharp/Ext.cs
+++ b/websocket-sharp/Ext.cs
@@ -756,7 +756,7 @@ internal static void ReadBytesAsync (
               return;
             }
 
-            if (nread == 0 || nread == length) {
+            if (nread == length) {
               if (completed != null)
                 completed (buff.SubArray (0, offset + nread));